Performance Evaluation and Analysis of OSTBC-MIMO-OFDM Systems using Multiple Polarized Antennas
万 耕 (1251214)
Combined use of Orthogonal Space-Time Block Coding (OSTBC), Multiple-Input Multiple-Output and Orthogonal Frequency Division Multiplexing (OSTBC -MIMO-OFDM) technologies in wireless communication systems would significantly enhance the channel capacity, spectral efficiency as well as the transmission reliability over multi-path fading channels. However, the use of spatially-separated uni-polarized (UP) antennas in traditional OSTBC-MIMO-OFDM systems would result in high-cost antenna deployments due to the large antenna spacing that required at both the transmit and receive ends. Hence, the use of co-located orthogonally-polarized antennas, such as dual-polarized (DP) antennas and triple-polarized (TP) antennas, appears to be a space- and cost-effective solution. In this work, we model the DP and TP channels both for Non-line-of-sight (NLOS) and Line-of-sight (LOS) wireless scenarios. Then, we further investigate the error bit rate (BER) performances of OSTBC-MIMO-OFDM systems using proposed DP and TP channel models for NLOS and LOS wireless scenarios and compare them with that of using spatially-separated UP antennas. Simulation results show BER performance improvement of OSTBC-MIMO-OFDM systems when using multiple DP and TP antennas at both the transmit and receive sides.